gold leads have been used commonly for long term storage parts.  It is
important for R&O shop to pre-tinning the aging parts in order to varify the
solderability.  It is a unusual to leave the Au on the leads... By the way,
why you have gold leads part?  Are you try to solder insertion parts (like
microprocessor used for socket)?  Are you using long term storage parts?
Otherwise, why not order the tin or solder lead finishing?
                        jk

At 04:10 PM 8/31/99 +0100, you wrote:
>Nick and all,
>
>We pre-tin our gold leads for the very same reasons you mention.
>
>What do your customers say to the change?
>
>Hans
>
>Air Force Material Command - We keep them flying!
>~~~~~~~~
>Hans M. Hinners                                 WR-ALC/LYPME Bldg. 640
>Materials Engineer                                      380 Second Street,
>Suite 104
>Manufacturing Eng. Sec.                         Robins AFB GA 31098-1638
>912-926-1970 (Voice) 468 - 1970 (DSN)   912-926-7974 (Fax)
>[log in to unmask]
>
>
>> -----Original Message-----
>> From: Nick D'Onofrio [SMTP:[log in to unmask]]
>> Sent: Tuesday, August 31, 1999 09:26
>> To:   [log in to unmask]
>> Subject:      [TN] Pre-tinning gold leads
>> Importance:   Low
>>
>>   We are pre-tinning the gold leads prior to assembly on our military
>> products. I'm looking for some constructive data or argument to decide if
>> we
>> should continue this practice.
>>   My concern would be gold embrittlement in the solder joint and any
>> latent
>> failures attributed to this.
>>   Any comments or guidance in this matter would appreciated.
>>
>> Regards,
>> Nick D.
>>
>
>##############################################################
>TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c
>##############################################################
>To subscribe/unsubscribe, send a message to [log in to unmask] with following
text in
>the body:
>To subscribe:   SUBSCRIBE TECHNET <your full name>
>To unsubscribe:   SIGNOFF TECHNET
>##############################################################
>Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional
>information.
>If you need assistance - contact Gayatri Sardeshpande at [log in to unmask] or
>847-509-9700 ext.5365
>##############################################################
>

##############################################################
TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c
##############################################################
To subscribe/unsubscribe, send a message to [log in to unmask] with following text in
the body:
To subscribe:   SUBSCRIBE TECHNET <your full name>
To unsubscribe:   SIGNOFF TECHNET
##############################################################
Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional
information.
If you need assistance - contact Gayatri Sardeshpande at [log in to unmask] or
847-509-9700 ext.5365
##############################################################